网络不可变性;不变数
例句:
Shape Shadow Research on the Geometrical Unchangeability and the Stress Analysis of Honeycomb Triangular Pyramidal Plate Type Space Trusses
蜂窝形三角锥平板网架几何不变性及内力分析的研究
The Unchangeability of the Light Velocity at the Compton Scattering
康普顿散射的光速不变性
A Sufficient and necessary condition of unchangeability about Simplicial homology group and application
单纯同调群不变性的一个充要条件及其应用